---
name: "bios"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/bios"
---

# bios(4)

a driver for PC Firmware, aka BIOS

## NAME

**bios** – a driver for PC Firmware, aka BIOS

## SYNOPSIS

**bios0 at mainbus0**

## DESCRIPTION

OpenBSD provides support for a limited subset of PC firmware (aka BIOS) subsystems on this platform. Only SMBIOS is supported.

SMBIOS provides detail about system hardware configuration and is used to attach [ipmi(4)](/ipmi/4.md) on most systems.

## SEE ALSO

[intro(4)](/intro/4.md), [ipmi(4)](/ipmi/4.md)

## HISTORY

The **bios** driver was introduced to this platform in OpenBSD 4.0.